Abstract:

Relying on the olfactory mechanism to recognize odors from the host and nonhost plants, the phytophagous insects can behaviorally orientate the host trees rapidly to mitigate the influence from detimental environmental impacts. Various nonhost volatiles may exert to different degrees repellent effects from nonhost habitat, species and unsuitable hosts. In this paper, we reviewed the category and functions of the nonhost volatiles, olfactory recognition by electrophysiological means as well as the behavioral responses of the conifer bark beetles to nonhost volatiles. Furthermore, the direction for research and potential use of nonhost volatiles in conifer bark beetle management in China were put forward.

Key words: bark beetles, nonhost volatiles, olfactory recognition, behavioral responses